Use Typeable instead of ADT

3 files changed, 13 insertions, 11 deletions

diff --git a/src/Hakyll/Web/FileType.hs b/src/Hakyll/Web/FileType.hs
index 4da1439..a958fed 100644
--- a/src/Hakyll/Web/FileType.hs
+++ b/src/Hakyll/Web/FileType.hs
@@ -51,5 +51,5 @@ fileType = fileType' . takeExtension
 
 -- | Get the file type for the current file
 --
-getFileType :: TargetM a FileType
+getFileType :: TargetM FileType
 getFileType = fileType . toFilePath <$> getIdentifier
diff --git a/src/Hakyll/Web/Page.hs b/src/Hakyll/Web/Page.hs
index 92303c1..78178cb 100644
--- a/src/Hakyll/Web/Page.hs
+++ b/src/Hakyll/Web/Page.hs
@@ -2,6 +2,7 @@
 -- type 'String') and number of metadata fields. This type is used to represent
 -- pages on your website.
 --
+{-# LANGUAGE DeriveDataTypeable #-}
 module Hakyll.Web.Page
     ( Page (..)
     , toMap
@@ -12,6 +13,7 @@ import Control.Applicative ((<$>), (<*>))
 import Data.Map (Map)
 import qualified Data.Map as M
 import Data.Binary (Binary, get, put)
+import Data.Typeable (Typeable)
 
 import Hakyll.Core.Writable
 
@@ -20,7 +22,7 @@ import Hakyll.Core.Writable
 data Page a = Page
     { pageMetadata :: Map String String
     , pageBody     :: a
-    }
+    } deriving (Show, Typeable)
 
 instance Functor Page where
     fmap f (Page m b) = Page m (f b)
diff --git a/src/Hakyll/Web/Pandoc.hs b/src/Hakyll/Web/Pandoc.hs
index 57fd1ac..17cac81 100644
--- a/src/Hakyll/Web/Pandoc.hs
+++ b/src/Hakyll/Web/Pandoc.hs
@@ -29,9 +29,9 @@ import Hakyll.Web.Page
 
 -- | Read a string using pandoc, with the default options
 --
-readPandoc :: FileType       -- ^ File type, determines how parsing happens
-           -> String         -- ^ String to read
-           -> Pandoc         -- ^ Resulting document
+readPandoc :: FileType  -- ^ File type, determines how parsing happens
+           -> String    -- ^ String to read
+           -> Pandoc    -- ^ Resulting document
 readPandoc = readPandocWith defaultParserState
 
 -- | Read a string using pandoc, with the supplied options
@@ -51,8 +51,8 @@ readPandocWith state fileType' = case fileType' of
 
 -- | Write a document (as HTML) using pandoc, with the default options
 --
-writePandoc :: Pandoc           -- ^ Document to write
-            -> String           -- ^ Resulting HTML
+writePandoc :: Pandoc  -- ^ Document to write
+            -> String  -- ^ Resulting HTML
 writePandoc = writePandocWith defaultWriterOptions
 
 -- | Write a document (as HTML) using pandoc, with the supplied options
@@ -64,19 +64,19 @@ writePandocWith = P.writeHtmlString
 
 -- | Read the resource using pandoc
 --
-pageReadPandoc :: Page String -> TargetM a (Page Pandoc)
+pageReadPandoc :: Page String -> TargetM (Page Pandoc)
 pageReadPandoc = pageReadPandocWith defaultParserState
 
 -- | Read the resource using pandoc
 --
-pageReadPandocWith :: P.ParserState -> Page String -> TargetM a (Page Pandoc)
+pageReadPandocWith :: P.ParserState -> Page String -> TargetM (Page Pandoc)
 pageReadPandocWith state page = do
     fileType' <- getFileType
     return $ readPandocWith state fileType' <$> page
 
 -- | Render the resource using pandoc
 --
-pageRenderPandoc :: Page String -> TargetM a (Page String)
+pageRenderPandoc :: Page String -> TargetM (Page String)
 pageRenderPandoc = pageRenderPandocWith defaultParserState defaultWriterOptions
 
 -- | Render the resource using pandoc
@@ -84,7 +84,7 @@ pageRenderPandoc = pageRenderPandocWith defaultParserState defaultWriterOptions
 pageRenderPandocWith :: P.ParserState
                      -> P.WriterOptions
                      -> Page String
-                     -> TargetM a (Page String)
+                     -> TargetM (Page String)
 pageRenderPandocWith state options page = do
     pandoc <- pageReadPandocWith state page
     return $ writePandocWith options <$> pandoc